<template>
  <div>
    <div v-show='eidet'>全场清仓，全部5折</div>


     <ul>
        <li v-for='item in goods' :key='item.name'>
            <div>{{item.name}}</div>
            <div>{{item.price}}</div>
            <div>折扣：{{item.discount*100}}%</div>
        </li>
     </ul>
     <button @click='fn'>开启活动</button>
   </div>
</template>
 
<script>
export default {

  data() {
    return {
      eidet:false,
        goods:[
            {
                name:'mac电脑',
                price:'15000',
                discount:1
            },
            {
                name:'百事可乐',
                price:'3',
                discount:1
            },
            {
                name:'保温杯',
                price:'99',
                discount:1
            },
            {
                name:'保暖手套',
                price:'130',
                discount:1
            },
        ]
    };
  },
  computed: {},

  methods: {
    fn(){
      this.eidet=true;
      this.goods.forEach(item=>{item.discount=0.5; item.price=0.5*item.price})
    }
  }
};
</script>

<style scoped>
ul {
    margin: 0;
    padding: 0;
}

li {
    list-style: none;
    width: 200px;
    height: 80px;
    padding:10px 0 0 0 ;
    border: 2px solid #333;
}
</style>